Hi Angela, you may have already found this older post in your travels that has drawbar setting ideas for reggae.
It depends a lot on what sound you’re after and what organ model you choose but 864202468 is a place to start. For a bubble, the upper-mid drawbars seem to often be pushed forward. I’m mostly playing just through Garageband and Logic Pro – the latter has a Reggae Organ instrument patch with “Vintage B3” and upper drawbars at 808600004, lower drawbars of 040805005, pedal drawbars of 83.
Interested to learn what you come up with!